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ntdll: Implemented NtReadFileScatter.

This commit is contained in:
Alexandre Julliard 2008-03-14 20:29:00 +01:00
parent 8ef6713acb
commit 81e4a0f6f3
3 changed files with 90 additions and 5 deletions
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85
dlls/ntdll/file.c
View File

@ -715,6 +715,91 @@ err:
return status;
}
/******************************************************************************
* NtReadFileScatter [NTDLL.@]
* ZwReadFileScatter [NTDLL.@]
*/
NTSTATUS WINAPI NtReadFileScatter( HANDLE file, HANDLE event, PIO_APC_ROUTINE apc, void *apc_user,
PIO_STATUS_BLOCK io_status, FILE_SEGMENT_ELEMENT *segments,
ULONG length, PLARGE_INTEGER offset, PULONG key )
{
size_t page_size = getpagesize();
int result, unix_handle, needs_close;
unsigned int options;
NTSTATUS status;
ULONG pos = 0, total = 0;
enum server_fd_type type;
ULONG_PTR cvalue = apc ? 0 : (ULONG_PTR)apc_user;
TRACE( "(%p,%p,%p,%p,%p,%p,0x%08x,%p,%p),partial stub!\n",
file, event, apc, apc_user, io_status, segments, length, offset, key);
if (length % page_size) return STATUS_INVALID_PARAMETER;
if (!io_status) return STATUS_ACCESS_VIOLATION;
status = server_get_unix_fd( file, FILE_READ_DATA, &unix_handle,
&needs_close, &type, &options );
if (status) return status;
if ((type != FD_TYPE_FILE) ||
(options & (FILE_SYNCHRONOUS_IO_ALERT | FILE_SYNCHRONOUS_IO_NONALERT)) ||
!(options & FILE_NO_INTERMEDIATE_BUFFERING))
{
status = STATUS_INVALID_PARAMETER;
goto error;
}
while (length)
{
if (offset && offset->QuadPart != (LONGLONG)-2 /* FILE_USE_FILE_POINTER_POSITION */)
result = pread( unix_handle, (char *)segments->Buffer + pos,
page_size - pos, offset->QuadPart + total );
else
result = read( unix_handle, (char *)segments->Buffer + pos, page_size - pos );
if (result == -1)
{
if (errno == EINTR) continue;
status = FILE_GetNtStatus();
break;
}
if (!result)
{
status = STATUS_END_OF_FILE;
break;
}
total += result;
length -= result;
if ((pos += result) == page_size)
{
pos = 0;
segments++;
}
}
if (cvalue) NTDLL_AddCompletion( file, cvalue, status, total );
error:
if (needs_close) close( unix_handle );
if (status == STATUS_SUCCESS)
{
io_status->u.Status = status;
io_status->Information = total;
TRACE("= SUCCESS (%u)\n", total);
if (event) NtSetEvent( event, NULL );
if (apc) NtQueueApcThread( GetCurrentThread(), (PNTAPCFUNC)apc,
(ULONG_PTR)apc_user, (ULONG_PTR)io_status, 0 );
}
else
{
TRACE("= 0x%08x\n", status);
if (status != STATUS_PENDING && event) NtResetEvent( event, NULL );
}
return status;
}
/***********************************************************************
* FILE_AsyncWriteService (INTERNAL)
*/

8
dlls/ntdll/ntdll.spec
View File

@ -275,8 +275,8 @@
@ stdcall NtQueueApcThread(long ptr long long long)
@ stdcall NtRaiseException(ptr ptr long)
@ stub NtRaiseHardError
@ stdcall NtReadFile(long long long long long long long long long)
@ stub NtReadFileScatter
@ stdcall NtReadFile(long long ptr ptr ptr ptr long ptr ptr)
@ stdcall NtReadFileScatter(long long ptr ptr ptr ptr long ptr ptr)
@ stub NtReadRequestData
@ stdcall NtReadVirtualMemory(long ptr ptr long ptr)
@ stub NtRegisterNewDevice
@ -1118,8 +1118,8 @@
@ stdcall ZwQueueApcThread(long ptr long long long) NtQueueApcThread
@ stdcall ZwRaiseException(ptr ptr long) NtRaiseException
@ stub ZwRaiseHardError
@ stdcall ZwReadFile(long long long long long long long long long) NtReadFile
# @ stub ZwReadFileScatter
@ stdcall ZwReadFile(long long ptr ptr ptr ptr long ptr ptr) NtReadFile
@ stdcall ZwReadFileScatter(long long ptr ptr ptr ptr long ptr ptr) NtReadFileScatter
@ stub ZwReadRequestData
@ stdcall ZwReadVirtualMemory(long ptr ptr long ptr) NtReadVirtualMemory
@ stub ZwRegisterNewDevice

2
include/winternl.h
View File

@ -1987,7 +1987,7 @@ NTSYSAPI NTSTATUS WINAPI NtQueryVolumeInformationFile(HANDLE,PIO_STATUS_BLOCK,P
NTSYSAPI NTSTATUS WINAPI NtRaiseException(PEXCEPTION_RECORD,PCONTEXT,BOOL);
NTSYSAPI NTSTATUS WINAPI NtRaiseHardError(NTSTATUS,ULONG,PUNICODE_STRING,PVOID*,HARDERROR_RESPONSE_OPTION,PHARDERROR_RESPONSE);
NTSYSAPI NTSTATUS WINAPI NtReadFile(HANDLE,HANDLE,PIO_APC_ROUTINE,PVOID,PIO_STATUS_BLOCK,PVOID,ULONG,PLARGE_INTEGER,PULONG);
NTSYSAPI NTSTATUS WINAPI NtReadFileScatter(HANDLE,HANDLE,PIO_APC_ROUTINE,PVOID,PIO_STATUS_BLOCK,FILE_SEGMENT_ELEMENT,ULONG,PLARGE_INTEGER,PULONG);
NTSYSAPI NTSTATUS WINAPI NtReadFileScatter(HANDLE,HANDLE,PIO_APC_ROUTINE,PVOID,PIO_STATUS_BLOCK,FILE_SEGMENT_ELEMENT*,ULONG,PLARGE_INTEGER,PULONG);
NTSYSAPI NTSTATUS WINAPI NtReadRequestData(HANDLE,PLPC_MESSAGE,ULONG,PVOID,ULONG,PULONG);
NTSYSAPI NTSTATUS WINAPI NtReadVirtualMemory(HANDLE,const void*,void*,SIZE_T,SIZE_T*);
NTSYSAPI NTSTATUS WINAPI NtRegisterThreadTerminatePort(HANDLE);